.cadre_gris {  background-attachment: fixed; background-image: url(../images/cadre_gris.jpg); background-repeat: no-repeat}
.calques_centre {  font-family: Arial, Helvetica, sans-serif; font-size: 8px; font-weight: normal; background-position: center center; color: #000000; background-repeat: no-repeat; background-color: #79808D; text-align: left; padding-top: 3px; padding-right: 3px; padding-bottom: 3px; padding-left: 3px; background-attachment: fixed; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px}